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power_supply: MAX17042: Support additional properties
This patch supports additional properties (PRESENT, CYCLE_COUNT, VOLTAGE_MAX, VOLTAGE_MIN_DESIGN, CURRENT_NOW, CURRENT_AVG, CHARGE_FULL, and TEMP). Plus, initialization code for registers is added. Signed-off-by: Donggeun Kim <dg77.kim@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com> Signed-off-by: KyungMin Park <kyungmin.park@samsung.com> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
This commit is contained in:
Donggeun Kim
Anton Vorontsov
parent
464f29a217
commit
086ef502c2
@ -29,74 +29,6 @@
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#include <linux/power_supply.h>
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#include <linux/power/max17042_battery.h>
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enum max17042_register {
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MAX17042_STATUS = 0x00,
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MAX17042_VALRT_Th = 0x01,
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MAX17042_TALRT_Th = 0x02,
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MAX17042_SALRT_Th = 0x03,
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MAX17042_AtRate = 0x04,
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MAX17042_RepCap = 0x05,
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MAX17042_RepSOC = 0x06,
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MAX17042_Age = 0x07,
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MAX17042_TEMP = 0x08,
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MAX17042_VCELL = 0x09,
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MAX17042_Current = 0x0A,
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MAX17042_AvgCurrent = 0x0B,
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MAX17042_Qresidual = 0x0C,
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MAX17042_SOC = 0x0D,
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MAX17042_AvSOC = 0x0E,
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MAX17042_RemCap = 0x0F,
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MAX17402_FullCAP = 0x10,
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MAX17042_TTE = 0x11,
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MAX17042_V_empty = 0x12,
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MAX17042_RSLOW = 0x14,
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MAX17042_AvgTA = 0x16,
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MAX17042_Cycles = 0x17,
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MAX17042_DesignCap = 0x18,
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MAX17042_AvgVCELL = 0x19,
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MAX17042_MinMaxTemp = 0x1A,
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MAX17042_MinMaxVolt = 0x1B,
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MAX17042_MinMaxCurr = 0x1C,
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MAX17042_CONFIG = 0x1D,
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MAX17042_ICHGTerm = 0x1E,
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MAX17042_AvCap = 0x1F,
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MAX17042_ManName = 0x20,
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MAX17042_DevName = 0x21,
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MAX17042_DevChem = 0x22,
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MAX17042_TempNom = 0x24,
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MAX17042_TempCold = 0x25,
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MAX17042_TempHot = 0x26,
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MAX17042_AIN = 0x27,
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MAX17042_LearnCFG = 0x28,
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MAX17042_SHFTCFG = 0x29,
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MAX17042_RelaxCFG = 0x2A,
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MAX17042_MiscCFG = 0x2B,
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MAX17042_TGAIN = 0x2C,
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MAx17042_TOFF = 0x2D,
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MAX17042_CGAIN = 0x2E,
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MAX17042_COFF = 0x2F,
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MAX17042_Q_empty = 0x33,
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MAX17042_T_empty = 0x34,
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MAX17042_RCOMP0 = 0x38,
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MAX17042_TempCo = 0x39,
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MAX17042_Rx = 0x3A,
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MAX17042_T_empty0 = 0x3B,
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MAX17042_TaskPeriod = 0x3C,
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MAX17042_FSTAT = 0x3D,
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MAX17042_SHDNTIMER = 0x3F,
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MAX17042_VFRemCap = 0x4A,
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MAX17042_QH = 0x4D,
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MAX17042_QL = 0x4E,
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};
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struct max17042_chip {
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struct i2c_client *client;
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struct power_supply battery;
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@ -123,10 +55,27 @@ static int max17042_read_reg(struct i2c_client *client, u8 reg)
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return ret;
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}
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static void max17042_set_reg(struct i2c_client *client,
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struct max17042_reg_data *data, int size)
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{
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int i;
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for (i = 0; i < size; i++)
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max17042_write_reg(client, data[i].addr, data[i].data);
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}
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static enum power_supply_property max17042_battery_props[] = {
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POWER_SUPPLY_PROP_PRESENT,
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POWER_SUPPLY_PROP_CYCLE_COUNT,
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POWER_SUPPLY_PROP_VOLTAGE_MAX,
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POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
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POWER_SUPPLY_PROP_VOLTAGE_NOW,
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POWER_SUPPLY_PROP_VOLTAGE_AVG,
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POWER_SUPPLY_PROP_CAPACITY,
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POWER_SUPPLY_PROP_CHARGE_FULL,
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POWER_SUPPLY_PROP_TEMP,
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POWER_SUPPLY_PROP_CURRENT_NOW,
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POWER_SUPPLY_PROP_CURRENT_AVG,
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};
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static int max17042_get_property(struct power_supply *psy,
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@ -137,6 +86,30 @@ static int max17042_get_property(struct power_supply *psy,
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struct max17042_chip, battery);
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switch (psp) {
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case POWER_SUPPLY_PROP_PRESENT:
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val->intval = max17042_read_reg(chip->client,
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MAX17042_STATUS);
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if (val->intval & MAX17042_STATUS_BattAbsent)
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val->intval = 0;
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else
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val->intval = 1;
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break;
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case POWER_SUPPLY_PROP_CYCLE_COUNT:
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val->intval = max17042_read_reg(chip->client,
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MAX17042_Cycles);
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break;
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case POWER_SUPPLY_PROP_VOLTAGE_MAX:
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val->intval = max17042_read_reg(chip->client,
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MAX17042_MinMaxVolt);
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val->intval >>= 8;
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val->intval *= 20000; /* Units of LSB = 20mV */
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break;
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case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
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val->intval = max17042_read_reg(chip->client,
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MAX17042_V_empty);
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val->intval >>= 7;
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val->intval *= 10000; /* Units of LSB = 10mV */
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break;
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case POWER_SUPPLY_PROP_VOLTAGE_NOW:
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val->intval = max17042_read_reg(chip->client,
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MAX17042_VCELL) * 83; /* 1000 / 12 = 83 */
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@ -149,6 +122,57 @@ static int max17042_get_property(struct power_supply *psy,
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val->intval = max17042_read_reg(chip->client,
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MAX17042_SOC) / 256;
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break;
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case POWER_SUPPLY_PROP_CHARGE_FULL:
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val->intval = max17042_read_reg(chip->client,
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MAX17042_RepSOC);
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if ((val->intval / 256) >= MAX17042_BATTERY_FULL)
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val->intval = 1;
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else if (val->intval >= 0)
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val->intval = 0;
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break;
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case POWER_SUPPLY_PROP_TEMP:
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val->intval = max17042_read_reg(chip->client,
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MAX17042_TEMP);
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/* The value is signed. */
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if (val->intval & 0x8000) {
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val->intval = (0x7fff & ~val->intval) + 1;
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val->intval *= -1;
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}
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/* The value is converted into deci-centigrade scale */
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/* Units of LSB = 1 / 256 degree Celsius */
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val->intval = val->intval * 10 / 256;
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break;
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case POWER_SUPPLY_PROP_CURRENT_NOW:
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if (chip->pdata->enable_current_sense) {
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val->intval = max17042_read_reg(chip->client,
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MAX17042_Current);
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if (val->intval & 0x8000) {
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/* Negative */
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val->intval = ~val->intval & 0x7fff;
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val->intval++;
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val->intval *= -1;
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}
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val->intval >>= 4;
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val->intval *= 1000000 * 25 / chip->pdata->r_sns;
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} else {
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return -EINVAL;
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}
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break;
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case POWER_SUPPLY_PROP_CURRENT_AVG:
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if (chip->pdata->enable_current_sense) {
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val->intval = max17042_read_reg(chip->client,
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MAX17042_AvgCurrent);
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if (val->intval & 0x8000) {
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/* Negative */
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val->intval = ~val->intval & 0x7fff;
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val->intval++;
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val->intval *= -1;
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}
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val->intval *= 1562500 / chip->pdata->r_sns;
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} else {
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return -EINVAL;
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}
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break;
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default:
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return -EINVAL;
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}
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@ -180,6 +204,11 @@ static int __devinit max17042_probe(struct i2c_client *client,
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chip->battery.properties = max17042_battery_props;
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chip->battery.num_properties = ARRAY_SIZE(max17042_battery_props);
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/* When current is not measured,
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* CURRENT_NOW and CURRENT_AVG properties should be invisible. */
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if (!chip->pdata->enable_current_sense)
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chip->battery.num_properties -= 2;
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ret = power_supply_register(&client->dev, &chip->battery);
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if (ret) {
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dev_err(&client->dev, "failed: power supply register\n");
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@ -187,10 +216,18 @@ static int __devinit max17042_probe(struct i2c_client *client,
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return ret;
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}
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/* Initialize registers according to values from the platform data */
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if (chip->pdata->init_data)
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max17042_set_reg(client, chip->pdata->init_data,
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chip->pdata->num_init_data);
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if (!chip->pdata->enable_current_sense) {
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max17042_write_reg(client, MAX17042_CGAIN, 0x0000);
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max17042_write_reg(client, MAX17042_MiscCFG, 0x0003);
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max17042_write_reg(client, MAX17042_LearnCFG, 0x0007);
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} else {
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if (chip->pdata->r_sns == 0)
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chip->pdata->r_sns = MAX17042_DEFAULT_SNS_RESISTOR;
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}
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return 0;
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@ -23,8 +23,99 @@
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#ifndef __MAX17042_BATTERY_H_
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#define __MAX17042_BATTERY_H_
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#define MAX17042_STATUS_BattAbsent (1 << 3)
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#define MAX17042_BATTERY_FULL (100)
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#define MAX17042_DEFAULT_SNS_RESISTOR (10000)
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enum max17042_register {
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MAX17042_STATUS = 0x00,
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MAX17042_VALRT_Th = 0x01,
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MAX17042_TALRT_Th = 0x02,
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MAX17042_SALRT_Th = 0x03,
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MAX17042_AtRate = 0x04,
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MAX17042_RepCap = 0x05,
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MAX17042_RepSOC = 0x06,
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MAX17042_Age = 0x07,
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MAX17042_TEMP = 0x08,
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MAX17042_VCELL = 0x09,
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MAX17042_Current = 0x0A,
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MAX17042_AvgCurrent = 0x0B,
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MAX17042_Qresidual = 0x0C,
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MAX17042_SOC = 0x0D,
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MAX17042_AvSOC = 0x0E,
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MAX17042_RemCap = 0x0F,
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MAX17402_FullCAP = 0x10,
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MAX17042_TTE = 0x11,
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MAX17042_V_empty = 0x12,
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MAX17042_RSLOW = 0x14,
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MAX17042_AvgTA = 0x16,
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MAX17042_Cycles = 0x17,
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MAX17042_DesignCap = 0x18,
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MAX17042_AvgVCELL = 0x19,
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MAX17042_MinMaxTemp = 0x1A,
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MAX17042_MinMaxVolt = 0x1B,
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MAX17042_MinMaxCurr = 0x1C,
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MAX17042_CONFIG = 0x1D,
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MAX17042_ICHGTerm = 0x1E,
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MAX17042_AvCap = 0x1F,
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MAX17042_ManName = 0x20,
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MAX17042_DevName = 0x21,
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MAX17042_DevChem = 0x22,
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MAX17042_TempNom = 0x24,
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MAX17042_TempCold = 0x25,
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MAX17042_TempHot = 0x26,
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MAX17042_AIN = 0x27,
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MAX17042_LearnCFG = 0x28,
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MAX17042_SHFTCFG = 0x29,
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MAX17042_RelaxCFG = 0x2A,
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MAX17042_MiscCFG = 0x2B,
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MAX17042_TGAIN = 0x2C,
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MAx17042_TOFF = 0x2D,
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MAX17042_CGAIN = 0x2E,
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MAX17042_COFF = 0x2F,
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MAX17042_Q_empty = 0x33,
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MAX17042_T_empty = 0x34,
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MAX17042_RCOMP0 = 0x38,
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MAX17042_TempCo = 0x39,
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MAX17042_Rx = 0x3A,
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MAX17042_T_empty0 = 0x3B,
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MAX17042_TaskPeriod = 0x3C,
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MAX17042_FSTAT = 0x3D,
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MAX17042_SHDNTIMER = 0x3F,
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MAX17042_VFRemCap = 0x4A,
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MAX17042_QH = 0x4D,
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MAX17042_QL = 0x4E,
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};
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/*
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* used for setting a register to a desired value
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* addr : address for a register
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* data : setting value for the register
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*/
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struct max17042_reg_data {
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u8 addr;
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u16 data;
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};
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struct max17042_platform_data {
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struct max17042_reg_data *init_data;
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int num_init_data; /* Number of enties in init_data array */
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bool enable_current_sense;
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/*
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* R_sns in micro-ohms.
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* default 10000 (if r_sns = 0) as it is the recommended value by
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* the datasheet although it can be changed by board designers.
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*/
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unsigned int r_sns;
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};
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#endif /* __MAX17042_BATTERY_H_ */
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